so one of your reasons that this is dumb and ineffective is because its not proven to be more effective...? regardless of the fact that its definately no less effective?
how long does it really take you to screw on an MFL connection (which is moot because the OP is already doing this so he doesnt have to change anything)? do you need to be constantly sampling the beer before its ready?
the only valid point there is the sediment one, but its effect on that should be limited. personally, i have very little sedimate in anything that gets kegged. but for those that dont secondary their beer or cold crash in a carboy, you get maybe .5 inches of crap on the bottom. most dip tubes sit about half an inch off the bottom to begin with, and the CO2 bubble is really disturbing an area maybe 1" diameter around the dip tube bottom so not much should be kicked up. the floor of the keg would be the only area not disturbed very much by the bubble.
any other theories that actually support this being totally "dumb and ineffective"? i still havnt seen any...